a girl weighing 50kg is standing on pencil heels, each having an area of cross-section of 1cm.square. An elephant weighing 200kg and whose foot covers an area of cross-section of 250cm.square standing on the floor. Which of the 2 exerts more pressure?Note: {Pressure=force/area, force=mass × acceleration due to gravity (i.e.10)}Also note that area of one shoe and leg is 1cm and 250cm sqaure respectively
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3
obviously the girls pressure because of by less area (pencil heels)it leads to more pressure
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4
Force exerted by girl
= (50 X 10) / 2 X 0.01 X 0.01 (∵ Force is evenly distributed between 2 legs)
= 2500000 N m⁻²
Force exerted by elephant
= (200 X 10) / 4 X 2.5 X 2.5 (∵ Force is evenly distributed between 4 legs)
= 80 N m⁻²
∴ Girl exerts more pressure.
Hope it helps you. :)
= (50 X 10) / 2 X 0.01 X 0.01 (∵ Force is evenly distributed between 2 legs)
= 2500000 N m⁻²
Force exerted by elephant
= (200 X 10) / 4 X 2.5 X 2.5 (∵ Force is evenly distributed between 4 legs)
= 80 N m⁻²
∴ Girl exerts more pressure.
Hope it helps you. :)
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